Well the WSJ had an article about a depleted oil well that 15 years later they discovered was full again. They found a plume of oil coming up from below. The speculation is that it’s not dead dinosaurs but created in the crust. It is infinite.
Probably from another fracture zone nearby. I don’t doubt we’ve hardly tapped the top of our petroleum reserves but I don’t think crude oil just continues to be made and “burped up” to the surface...